Patents by Inventor Ning-Ning Feng
Ning-Ning Feng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8897606Abstract: The ring resonator includes waveguides configured to guide light signals. The waveguides include an input waveguide and one or more loop waveguides. One of the loop waveguides is a primary loop waveguide that is optically coupled with the input waveguide at a wavelength of light. A tuner is configured to tune the wavelength at which the light is optically coupled from the input waveguide into the primary loop waveguide. One or more light detectors are each configured to provide an output indicating an intensity of light guided in one of the one or more loop waveguides. Electronics are configured to tune the tuner in response to the output from the light detector.Type: GrantFiled: December 1, 2010Date of Patent: November 25, 2014Assignee: Kotura, Inc.Inventors: Mehdi Asghari, Dazeng Feng, Po Dong, Roshanak Shafiiha, Shirong Liao, Ning-Ning Feng
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Patent number: 8842946Abstract: The light sensor is included on an optical device having a waveguide on a base. The waveguide is configured to guide a light signal through a crystalline light-transmitting medium. The light sensor is also positioned on the base and is configured to receive the light signal from the waveguide. The light sensor includes a planar interface between two different materials. The interface is at a 45° angle relative to a <110> direction of the light-transmitting medium.Type: GrantFiled: March 26, 2012Date of Patent: September 23, 2014Assignee: Kotura, Inc.Inventors: Shirong Liao, Cheng-Chih Kung, Dazeng Feng, Ning-Ning Feng, Yong Liu, Roshanak Shafiiha
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Patent number: 8639065Abstract: The system includes a light-transmitting medium positioned on a base. The light-transmitting medium included a ridge and a slab region. The ridge extends upward from the slab region and defines a portion of a waveguide on the base. The waveguide is configured to guide a light signal through the device. The device also includes an avalanche effect light sensor positioned on the base and configured to detect the presence of the light signal. The light sensor includes a light-absorbing medium positioned on the ridge of the light-transmitting medium such that the light signal is coupled from the light-transmitting medium into the light-absorbing medium. The light-transmitting includes a charge layer located at an interface of the light-transmitting medium and the light-absorbing medium. A multiplication region is formed in the slab regions of the light-transmitting medium such that the multiplication region receives charge carriers from the charge layer during the operation of the light sensor.Type: GrantFiled: June 18, 2010Date of Patent: January 28, 2014Assignee: Kotura, Inc.Inventors: Ning-Ning Feng, Shirong Liao, Dawei Zheng, Dazeng Feng
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Patent number: 8476576Abstract: An optical device includes a light-transmitting medium positioned on a base. The light-transmitting medium defines a waveguide. The optical device also includes a light sensor. The light sensor includes a light-absorbing medium positioned on the base. A portion of the waveguide ends at a facet such that a first portion of a light signal being guided by the wavegide passes through the facet and a second portion of the light signal bypasses the facet and remains in the light-transmitting medium. The light-absorbing medium is positioned on the light-transmitting medium such that the light-transmitting medium is between the light-absorbing medium and the base. Additionally, the light-absorbing medium is positioned on the light-transmitting medium such that the light-absorbing medium receives the first portion of the light signal that passes through the facet.Type: GrantFiled: April 28, 2010Date of Patent: July 2, 2013Assignee: Kotura, Inc.Inventors: Po Dong, Dazeng Feng, Ning-Ning Feng, Dawei Zheng, Mehdi Asghari
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Patent number: 8346028Abstract: The optical device includes a waveguide on a base. The device also includes a modulator on the base. The modulator includes an electro-absorption medium configured to receive a light signal from the waveguide. The modulator also includes field sources for generating an electrical field in the electro-absorption medium. The electro-absorption medium is a medium in which the Franz-Keldysh effect occurs in response to the formation of the electrical field in the electro-absorption medium. The field sources are configured so the electrical field is substantially parallel to the base.Type: GrantFiled: December 15, 2009Date of Patent: January 1, 2013Assignee: Kotura, Inc.Inventors: Dazeng Feng, Po Dong, Ning-Ning Feng, Mehdi Asghari
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Publication number: 20110310467Abstract: The system includes a light-transmitting medium positioned on a base. The light-transmitting medium included a ridge and a slab region. The ridge extends upward from the slab region and defines a portion of a waveguide on the base. The waveguide is configured to guide a light signal through the device. The device also includes an avalanche effect light sensor positioned on the base and configured to detect the presence of the light signal. The light sensor includes a light-absorbing medium positioned on the ridge of the light-transmitting medium such that the light signal is coupled from the light-transmitting medium into the light-absorbing medium. The light-transmitting includes a charge layer located at an interface of the light-transmitting medium and the light-absorbing medium. A multiplication region is formed in the slab regions of the light-transmitting medium such that the multiplication region receives charge carriers from the charge layer during the operation of the light sensor.Type: ApplicationFiled: June 18, 2010Publication date: December 22, 2011Inventors: Ning-Ning Feng, Shirong Liao, Dawei Zheng, Dazeng Feng
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Patent number: 8053790Abstract: The optical device includes a waveguide and a light sensor on a base. The light sensor includes a light-absorbing medium configured to receive a light signal from the waveguide. The light sensor also includes field sources for generating an electrical field in the light-absorbing medium. The field sources are configured so the electrical field is substantially parallel to the base.Type: GrantFiled: February 19, 2009Date of Patent: November 8, 2011Assignee: Kotusa, Inc.Inventors: Dazeng Feng, Po Dong, Mehdi Asghari, Ning-Ning Feng
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Publication number: 20110266422Abstract: An optical device includes a light-transmitting medium positioned on a base. The light-transmitting medium defines a waveguide. The optical device also includes a light sensor. The light sensor includes a light-absorbing medium positioned on the base. A portion of the waveguide ends at a facet such that a first portion of a light signal being guided by the wavegide passes through the facet and a second portion of the light signal bypasses the facet and remains in the light-transmitting medium. The light-absorbing medium is positioned on the light-transmitting medium such that the light-transmitting medium is between the light-absorbing medium and the base. Additionally, the light-absorbing medium is positioned on the light-transmitting medium such that the light-absorbing medium receives the first portion of the light signal that passes through the facet.Type: ApplicationFiled: April 28, 2010Publication date: November 3, 2011Inventors: Po Dong, Dazeng Feng, Ning-Ning Feng, Dawei Zheng, Mehdi Asghari
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Publication number: 20110142390Abstract: The optical device includes a waveguide on a base. The device also includes a modulator on the base. The modulator includes an electro-absorption medium configured to receive a light signal from the waveguide. The modulator also includes field sources for generating an electrical field in the electro-absorption medium. The electro-absorption medium is a medium in which the Franz-Keldysh effect occurs in response to the formation of the electrical field in the electro-absorption medium. The field sources are configured so the electrical field is substantially parallel to the base.Type: ApplicationFiled: December 15, 2009Publication date: June 16, 2011Inventors: Dazeng Feng, Po Dong, Ning-Ning Feng, Mehdi Asghari
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Publication number: 20110142391Abstract: The ring resonator includes waveguides configured to guide light signals. The waveguides include an input waveguide and one or more loop waveguides. One of the loop waveguides is a primary loop waveguide that is optically coupled with the input waveguide at a wavelength of light. A tuner is configured to tune the wavelength at which the light is optically coupled from the input waveguide into the primary loop waveguide. One or more light detectors are each configured to provide an output indicating an intensity of light guided in one of the one or more loop waveguides. Electronics are configured to tune the tuner in response to the output from the light detector.Type: ApplicationFiled: December 1, 2010Publication date: June 16, 2011Inventors: Mehdi Asghari, Dazeng Feng, Po Dong, Roshanak Shafiiha, Shirong Liao, Ning-Ning Feng
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Patent number: 7903246Abstract: A method is shown for the extension in higher spatial dimensions of deterministic, aperiodic structures which exhibit strong aperiodic effects and have overall compatibility with the planar technology of integrated optical circuits. Disclosed devices are operative in response to incident electromagnetic energy to create a distribution of electromagnetic energy having localized electromagnetic field enhancement, wherein the device includes a dielectric or plasmonic material having a region of interaction with the incident electromagnetic energy.Type: GrantFiled: April 14, 2009Date of Patent: March 8, 2011Assignees: Trustees of Boston University, The Board of Trustees of the Leland Stanford Junior UniversityInventors: Luca Dal Negro, Ashwin Gopinath, Ning-Ning Feng, Mark Luitzen Brongersma
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Patent number: 7872233Abstract: A surface plasmon polariton (SPP) pixel structure is provided. The SPP pixel structure includes a coupling structure that couples the probing light into the SPP mode by matching the in-plane wave vector by changing the refractive index of the coupling structure using thermo-optic effects to vary the coupling strength of the probing light into the SPP mode. An absorber layer is positioned on the coupling structure for absorbing incident infrared/thermal radiation being detected.Type: GrantFiled: January 28, 2009Date of Patent: January 18, 2011Assignee: Massachusetts Institute of TechnologyInventors: Juejun Hu, Ning-Ning Feng, Anuradha M. Agarwal, Lionel C. Kimerling
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Publication number: 20100207223Abstract: The optical device includes a waveguide and a light sensor on a base. The light sensor includes a light-absorbing medium configured to receive a light signal from the waveguide. The light sensor also includes field sources for generating an electrical field in the light-absorbing medium. The field sources are configured so the electrical field is substantially parallel to the base.Type: ApplicationFiled: February 19, 2009Publication date: August 19, 2010Inventors: Dazeng Feng, Po Dong, Mehdi Asghari, Ning-Ning Feng
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Publication number: 20100187530Abstract: An infrared photodiode structure is provided. The infrared photodiode structure includes a doped semiconductor layer having ions of certain conductivity. An active photodetecting region is positioned on the doped semiconductor layer for detecting an infrared light signal. The active photodetecting region includes one or more amorphous semiconductor materials so as to allow for high signal-to-noise ratio being achieved by invoking carrier hopping and band conduction, under dark and illuminated conditions.Type: ApplicationFiled: January 26, 2009Publication date: July 29, 2010Inventors: Juejun Hu, Ning-Ning Feng, Anuradha M. Agarwal, Lionel C. Kimerling
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Publication number: 20100187419Abstract: A surface plasmon polariton (SPP) pixel structure is provided. The SPP pixel structure includes a coupling structure that couples the probing light into the SPP mode by matching the in-plane wave vector by changing the refractive index of the coupling structure using thermo-optic effects to vary the coupling strength of the probing light into the SPP mode. An absorber layer is positioned on the coupling structure for absorbing incident infrared/thermal radiation being detected.Type: ApplicationFiled: January 28, 2009Publication date: July 29, 2010Inventors: Juejun Hu, Ning-Ning Feng, Anuradha M. Agarwal, Lionel C. Kimerling
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Publication number: 20090195879Abstract: A method is shown for the extension in higher spatial dimensions of deterministic, aperiodic structures which exhibit strong aperiodic effects and have overall compatibility with the planar technology of integrated optical circuits. Disclosed devices are operative in response to incident electromagnetic energy to create a distribution of electromagnetic energy having localized electromagnetic field enhancement, wherein the device includes a dielectric or plasmonic material having a region of interaction with the incident electromagnetic energy.Type: ApplicationFiled: April 14, 2009Publication date: August 6, 2009Applicants: Trustees of Boston University, The Board of Trustees of the Leland Stanford Junior UniversityInventors: Luca Dal Negro, Ashwin Gopinath, Ning-Ning Feng, Mark Luitzen Brongersma
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Patent number: 7565046Abstract: The mode transforming structure includes a first waveguide structure. A slot waveguide region is coupled to the first waveguide structure. The slot waveguide region includes one or more complementary tapered pairs so near lossless transforming between the first waveguide structure and the slot waveguide region occurs so as to allow optical modes to be transferred between the first waveguide and the slot waveguide region.Type: GrantFiled: December 12, 2007Date of Patent: July 21, 2009Assignee: Massachusetts Institute of TechnologyInventors: Ning-Ning Feng, Rong Sun, Lionel C. Kimerling, Jurgen Michel
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Publication number: 20080152279Abstract: The mode transforming structure includes a first waveguide structure. A slot waveguide region is coupled to the first waveguide structure. The slot waveguide region includes one or more complementary tapered pairs so near lossless transforming between the first waveguide structure and the slot waveguide region occurs so as to allow optical modes to be transferred between the first waveguide and the slot waveguide region.Type: ApplicationFiled: December 12, 2007Publication date: June 26, 2008Inventors: Ning-Ning Feng, Rong Sun, Lionel C. Kimerling, Jurgen Michel
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Patent number: 7352942Abstract: An optical field concentrator includes a plurality of waveguide layers comprising high index materials having a first defined thickness. At least one nano-layer structure is positioned between said waveguide layers. The at least one nano-layer structure comprises low index materials having a second defined thickness that is smaller than the first defined thickness. A plurality of cladding layers are positioned between the waveguide layers and the at least one nano-layer structure. The cladding layers have a third defined thickness that is larger than the first defined thickness.Type: GrantFiled: April 24, 2006Date of Patent: April 1, 2008Assignee: Massachusetts Institute of TechnologyInventors: Ning-Ning Feng, Jurgen Michel, Lionel C. Kimerling
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Publication number: 20070248308Abstract: An optical field concentrator includes a plurality of waveguide layers comprising high index materials having a first defined thickness. At least one nano-layer structure is positioned between said waveguide layers. The at least one nano-layer structure comprises low index materials having a second defined thickness that is smaller than the first defined thickness. A plurality of cladding layers are positioned between the waveguide layers and the at least one nano-layer structure. The cladding layers have a third defined thickness that is larger than the first defined thickness.Type: ApplicationFiled: April 24, 2006Publication date: October 25, 2007Inventors: Ning-Ning Feng, Jurgen Michel, Lionel Kimerling